Match the following terms and definitions.
1. a system of distinguishing groups for purposes of identification
taxonomist
2. a taxonomic category containing a group of similar genera
genus
3. a taxonomic category containing a group of similar species
family
4. the smallest taxonomic category
classification
5. a scientist who classifies organisms
taxonomy
6. the science of the classification of organisms
species

cats appear to have glowing cat eyes because the back of their eyeballs includes a special reflective surface called the tapetum lucidum. this lets them see better during the night, giving them a much better vision.

halogen, any of the six nonmetallic elements that constitute group 17 (group viia) of the periodic table. the halogen elements are fluorine (f), chlorine (cl), bromine (br), iodine (i), astatine (at), and tennessine (ts).